The electron which take part in order to exhibit variable Oxidation states by Transition metals are
ns only
ns and (n-1)d only but not np
(n-1)d only
(n-1)d and np only but not ns
Due to small energy difference b/w ns and (n-1)d orbital's, transition elements exhibit variable Oxidation states.
The electrons which take part in order to exhibit variable oxidation states by transition metals are:
Which transition element does not exhibit variable oxidation states?